enable buffer distance in buffer tool to be a parameter

[HazelAng2]

Hi all,

I am trying to build a toolset for some users using the model builder but was stuck at the point where I want to enable users to set their own value for buffer distance. 

The only parameters which i managed to create for the model are the input and output. Does anyone know if I am able to let the users set their own buffer distance as a parameter? 

Thanks!

[DanPatterson_Retired]

Just make it a parameter....  parameter in the model is designated with a ... P

arcmap and Pro both have them, see the picture and the procedure 

http://pro.arcgis.com/en/pro-app/help/analysis/geoprocessing/modelbuilder/model-parameters.htm